Agent Callback Mailbox for Claude Code
us.inversolabs/agent-callback-mailbox
Paid replay-safe callback inboxes for asynchronous agent tasks with structured MCP results.
client:Claude Code
transport:streamable-http
Install Agent Callback Mailbox in Claude Code
run in your project directory
claude mcp add --transport http agent-callback-mailbox https://callbacks.inversolabs.us/mcpAdds it for this project only. Append --scope user to make it available everywhere. Claude Code docs